mirror of
https://github.com/pierre42100/ComunicWeb
synced 2024-12-05 01:44:07 +00:00
466 lines
17 KiB
Python
466 lines
17 KiB
Python
|
#!/usr/bin/env python
|
||
|
# ***** BEGIN LICENSE BLOCK *****
|
||
|
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
||
|
#
|
||
|
# The contents of this file are subject to the Mozilla Public License Version
|
||
|
# 1.1 (the "License"); you may not use this file except in compliance with
|
||
|
# the License. You may obtain a copy of the License at
|
||
|
# http://www.mozilla.org/MPL/
|
||
|
#
|
||
|
# Software distributed under the License is distributed on an "AS IS" basis,
|
||
|
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
||
|
# for the specific language governing rights and limitations under the
|
||
|
# License.
|
||
|
#
|
||
|
# The Original Code is font utility code.
|
||
|
#
|
||
|
# The Initial Developer of the Original Code is Mozilla Corporation.
|
||
|
# Portions created by the Initial Developer are Copyright (C) 2009
|
||
|
# the Initial Developer. All Rights Reserved.
|
||
|
#
|
||
|
# Contributor(s):
|
||
|
# John Daggett <jdaggett@mozilla.com>
|
||
|
#
|
||
|
# Alternatively, the contents of this file may be used under the terms of
|
||
|
# either the GNU General Public License Version 2 or later (the "GPL"), or
|
||
|
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
||
|
# in which case the provisions of the GPL or the LGPL are applicable instead
|
||
|
# of those above. If you wish to allow use of your version of this file only
|
||
|
# under the terms of either the GPL or the LGPL, and not to allow others to
|
||
|
# use your version of this file under the terms of the MPL, indicate your
|
||
|
# decision by deleting the provisions above and replace them with the notice
|
||
|
# and other provisions required by the GPL or the LGPL. If you do not delete
|
||
|
# the provisions above, a recipient may use your version of this file under
|
||
|
# the terms of any one of the MPL, the GPL or the LGPL.
|
||
|
#
|
||
|
# ***** END LICENSE BLOCK ***** */
|
||
|
|
||
|
# eotlitetool.py - create EOT version of OpenType font for use with IE
|
||
|
#
|
||
|
# Usage: eotlitetool.py [-o output-filename] font1 [font2 ...]
|
||
|
#
|
||
|
|
||
|
# OpenType file structure
|
||
|
# http://www.microsoft.com/typography/otspec/otff.htm
|
||
|
#
|
||
|
# Types:
|
||
|
#
|
||
|
# BYTE 8-bit unsigned integer.
|
||
|
# CHAR 8-bit signed integer.
|
||
|
# USHORT 16-bit unsigned integer.
|
||
|
# SHORT 16-bit signed integer.
|
||
|
# ULONG 32-bit unsigned integer.
|
||
|
# Fixed 32-bit signed fixed-point number (16.16)
|
||
|
# LONGDATETIME Date represented in number of seconds since 12:00 midnight, January 1, 1904. The value is represented as a signed 64-bit integer.
|
||
|
#
|
||
|
# SFNT Header
|
||
|
#
|
||
|
# Fixed sfnt version // 0x00010000 for version 1.0.
|
||
|
# USHORT numTables // Number of tables.
|
||
|
# USHORT searchRange // (Maximum power of 2 <= numTables) x 16.
|
||
|
# USHORT entrySelector // Log2(maximum power of 2 <= numTables).
|
||
|
# USHORT rangeShift // NumTables x 16-searchRange.
|
||
|
#
|
||
|
# Table Directory
|
||
|
#
|
||
|
# ULONG tag // 4-byte identifier.
|
||
|
# ULONG checkSum // CheckSum for this table.
|
||
|
# ULONG offset // Offset from beginning of TrueType font file.
|
||
|
# ULONG length // Length of this table.
|
||
|
#
|
||
|
# OS/2 Table (Version 4)
|
||
|
#
|
||
|
# USHORT version // 0x0004
|
||
|
# SHORT xAvgCharWidth
|
||
|
# USHORT usWeightClass
|
||
|
# USHORT usWidthClass
|
||
|
# USHORT fsType
|
||
|
# SHORT ySubscriptXSize
|
||
|
# SHORT ySubscriptYSize
|
||
|
# SHORT ySubscriptXOffset
|
||
|
# SHORT ySubscriptYOffset
|
||
|
# SHORT ySuperscriptXSize
|
||
|
# SHORT ySuperscriptYSize
|
||
|
# SHORT ySuperscriptXOffset
|
||
|
# SHORT ySuperscriptYOffset
|
||
|
# SHORT yStrikeoutSize
|
||
|
# SHORT yStrikeoutPosition
|
||
|
# SHORT sFamilyClass
|
||
|
# BYTE panose[10]
|
||
|
# ULONG ulUnicodeRange1 // Bits 0-31
|
||
|
# ULONG ulUnicodeRange2 // Bits 32-63
|
||
|
# ULONG ulUnicodeRange3 // Bits 64-95
|
||
|
# ULONG ulUnicodeRange4 // Bits 96-127
|
||
|
# CHAR achVendID[4]
|
||
|
# USHORT fsSelection
|
||
|
# USHORT usFirstCharIndex
|
||
|
# USHORT usLastCharIndex
|
||
|
# SHORT sTypoAscender
|
||
|
# SHORT sTypoDescender
|
||
|
# SHORT sTypoLineGap
|
||
|
# USHORT usWinAscent
|
||
|
# USHORT usWinDescent
|
||
|
# ULONG ulCodePageRange1 // Bits 0-31
|
||
|
# ULONG ulCodePageRange2 // Bits 32-63
|
||
|
# SHORT sxHeight
|
||
|
# SHORT sCapHeight
|
||
|
# USHORT usDefaultChar
|
||
|
# USHORT usBreakChar
|
||
|
# USHORT usMaxContext
|
||
|
#
|
||
|
#
|
||
|
# The Naming Table is organized as follows:
|
||
|
#
|
||
|
# [name table header]
|
||
|
# [name records]
|
||
|
# [string data]
|
||
|
#
|
||
|
# Name Table Header
|
||
|
#
|
||
|
# USHORT format // Format selector (=0).
|
||
|
# USHORT count // Number of name records.
|
||
|
# USHORT stringOffset // Offset to start of string storage (from start of table).
|
||
|
#
|
||
|
# Name Record
|
||
|
#
|
||
|
# USHORT platformID // Platform ID.
|
||
|
# USHORT encodingID // Platform-specific encoding ID.
|
||
|
# USHORT languageID // Language ID.
|
||
|
# USHORT nameID // Name ID.
|
||
|
# USHORT length // String length (in bytes).
|
||
|
# USHORT offset // String offset from start of storage area (in bytes).
|
||
|
#
|
||
|
# head Table
|
||
|
#
|
||
|
# Fixed tableVersion // Table version number 0x00010000 for version 1.0.
|
||
|
# Fixed fontRevision // Set by font manufacturer.
|
||
|
# ULONG checkSumAdjustment // To compute: set it to 0, sum the entire font as ULONG, then store 0xB1B0AFBA - sum.
|
||
|
# ULONG magicNumber // Set to 0x5F0F3CF5.
|
||
|
# USHORT flags
|
||
|
# USHORT unitsPerEm // Valid range is from 16 to 16384. This value should be a power of 2 for fonts that have TrueType outlines.
|
||
|
# LONGDATETIME created // Number of seconds since 12:00 midnight, January 1, 1904. 64-bit integer
|
||
|
# LONGDATETIME modified // Number of seconds since 12:00 midnight, January 1, 1904. 64-bit integer
|
||
|
# SHORT xMin // For all glyph bounding boxes.
|
||
|
# SHORT yMin
|
||
|
# SHORT xMax
|
||
|
# SHORT yMax
|
||
|
# USHORT macStyle
|
||
|
# USHORT lowestRecPPEM // Smallest readable size in pixels.
|
||
|
# SHORT fontDirectionHint
|
||
|
# SHORT indexToLocFormat // 0 for short offsets, 1 for long.
|
||
|
# SHORT glyphDataFormat // 0 for current format.
|
||
|
#
|
||
|
#
|
||
|
#
|
||
|
# Embedded OpenType (EOT) file format
|
||
|
# http://www.w3.org/Submission/EOT/
|
||
|
#
|
||
|
# EOT version 0x00020001
|
||
|
#
|
||
|
# An EOT font consists of a header with the original OpenType font
|
||
|
# appended at the end. Most of the data in the EOT header is simply a
|
||
|
# copy of data from specific tables within the font data. The exceptions
|
||
|
# are the 'Flags' field and the root string name field. The root string
|
||
|
# is a set of names indicating domains for which the font data can be
|
||
|
# used. A null root string implies the font data can be used anywhere.
|
||
|
# The EOT header is in little-endian byte order but the font data remains
|
||
|
# in big-endian order as specified by the OpenType spec.
|
||
|
#
|
||
|
# Overall structure:
|
||
|
#
|
||
|
# [EOT header]
|
||
|
# [EOT name records]
|
||
|
# [font data]
|
||
|
#
|
||
|
# EOT header
|
||
|
#
|
||
|
# ULONG eotSize // Total structure length in bytes (including string and font data)
|
||
|
# ULONG fontDataSize // Length of the OpenType font (FontData) in bytes
|
||
|
# ULONG version // Version number of this format - 0x00020001
|
||
|
# ULONG flags // Processing Flags (0 == no special processing)
|
||
|
# BYTE fontPANOSE[10] // OS/2 Table panose
|
||
|
# BYTE charset // DEFAULT_CHARSET (0x01)
|
||
|
# BYTE italic // 0x01 if ITALIC in OS/2 Table fsSelection is set, 0 otherwise
|
||
|
# ULONG weight // OS/2 Table usWeightClass
|
||
|
# USHORT fsType // OS/2 Table fsType (specifies embedding permission flags)
|
||
|
# USHORT magicNumber // Magic number for EOT file - 0x504C.
|
||
|
# ULONG unicodeRange1 // OS/2 Table ulUnicodeRange1
|
||
|
# ULONG unicodeRange2 // OS/2 Table ulUnicodeRange2
|
||
|
# ULONG unicodeRange3 // OS/2 Table ulUnicodeRange3
|
||
|
# ULONG unicodeRange4 // OS/2 Table ulUnicodeRange4
|
||
|
# ULONG codePageRange1 // OS/2 Table ulCodePageRange1
|
||
|
# ULONG codePageRange2 // OS/2 Table ulCodePageRange2
|
||
|
# ULONG checkSumAdjustment // head Table CheckSumAdjustment
|
||
|
# ULONG reserved[4] // Reserved - must be 0
|
||
|
# USHORT padding1 // Padding - must be 0
|
||
|
#
|
||
|
# EOT name records
|
||
|
#
|
||
|
# USHORT FamilyNameSize // Font family name size in bytes
|
||
|
# BYTE FamilyName[FamilyNameSize] // Font family name (name ID = 1), little-endian UTF-16
|
||
|
# USHORT Padding2 // Padding - must be 0
|
||
|
#
|
||
|
# USHORT StyleNameSize // Style name size in bytes
|
||
|
# BYTE StyleName[StyleNameSize] // Style name (name ID = 2), little-endian UTF-16
|
||
|
# USHORT Padding3 // Padding - must be 0
|
||
|
#
|
||
|
# USHORT VersionNameSize // Version name size in bytes
|
||
|
# bytes VersionName[VersionNameSize] // Version name (name ID = 5), little-endian UTF-16
|
||
|
# USHORT Padding4 // Padding - must be 0
|
||
|
#
|
||
|
# USHORT FullNameSize // Full name size in bytes
|
||
|
# BYTE FullName[FullNameSize] // Full name (name ID = 4), little-endian UTF-16
|
||
|
# USHORT Padding5 // Padding - must be 0
|
||
|
#
|
||
|
# USHORT RootStringSize // Root string size in bytes
|
||
|
# BYTE RootString[RootStringSize] // Root string, little-endian UTF-16
|
||
|
|
||
|
|
||
|
|
||
|
import optparse
|
||
|
import struct
|
||
|
|
||
|
class FontError(Exception):
|
||
|
"""Error related to font handling"""
|
||
|
pass
|
||
|
|
||
|
def multichar(str):
|
||
|
vals = struct.unpack('4B', str[:4])
|
||
|
return (vals[0] << 24) + (vals[1] << 16) + (vals[2] << 8) + vals[3]
|
||
|
|
||
|
def multicharval(v):
|
||
|
return struct.pack('4B', (v >> 24) & 0xFF, (v >> 16) & 0xFF, (v >> 8) & 0xFF, v & 0xFF)
|
||
|
|
||
|
class EOT:
|
||
|
EOT_VERSION = 0x00020001
|
||
|
EOT_MAGIC_NUMBER = 0x504c
|
||
|
EOT_DEFAULT_CHARSET = 0x01
|
||
|
EOT_FAMILY_NAME_INDEX = 0 # order of names in variable portion of EOT header
|
||
|
EOT_STYLE_NAME_INDEX = 1
|
||
|
EOT_VERSION_NAME_INDEX = 2
|
||
|
EOT_FULL_NAME_INDEX = 3
|
||
|
EOT_NUM_NAMES = 4
|
||
|
|
||
|
EOT_HEADER_PACK = '<4L10B2BL2H7L18x'
|
||
|
|
||
|
class OpenType:
|
||
|
SFNT_CFF = multichar('OTTO') # Postscript CFF SFNT version
|
||
|
SFNT_TRUE = 0x10000 # Standard TrueType version
|
||
|
SFNT_APPLE = multichar('true') # Apple TrueType version
|
||
|
|
||
|
SFNT_UNPACK = '>I4H'
|
||
|
TABLE_DIR_UNPACK = '>4I'
|
||
|
|
||
|
TABLE_HEAD = multichar('head') # TrueType table tags
|
||
|
TABLE_NAME = multichar('name')
|
||
|
TABLE_OS2 = multichar('OS/2')
|
||
|
TABLE_GLYF = multichar('glyf')
|
||
|
TABLE_CFF = multichar('CFF ')
|
||
|
|
||
|
OS2_FSSELECTION_ITALIC = 0x1
|
||
|
OS2_UNPACK = '>4xH2xH22x10B4L4xH14x2L'
|
||
|
|
||
|
HEAD_UNPACK = '>8xL'
|
||
|
|
||
|
NAME_RECORD_UNPACK = '>6H'
|
||
|
NAME_ID_FAMILY = 1
|
||
|
NAME_ID_STYLE = 2
|
||
|
NAME_ID_UNIQUE = 3
|
||
|
NAME_ID_FULL = 4
|
||
|
NAME_ID_VERSION = 5
|
||
|
NAME_ID_POSTSCRIPT = 6
|
||
|
PLATFORM_ID_UNICODE = 0 # Mac OS uses this typically
|
||
|
PLATFORM_ID_MICROSOFT = 3
|
||
|
ENCODING_ID_MICROSOFT_UNICODEBMP = 1 # with Microsoft platformID BMP-only Unicode encoding
|
||
|
LANG_ID_MICROSOFT_EN_US = 0x0409 # with Microsoft platformID EN US lang code
|
||
|
|
||
|
def eotname(ttf):
|
||
|
i = ttf.rfind('.')
|
||
|
if i != -1:
|
||
|
ttf = ttf[:i]
|
||
|
return ttf + '.eotlite'
|
||
|
|
||
|
def readfont(f):
|
||
|
data = open(f, 'rb').read()
|
||
|
return data
|
||
|
|
||
|
def get_table_directory(data):
|
||
|
"""read the SFNT header and table directory"""
|
||
|
datalen = len(data)
|
||
|
sfntsize = struct.calcsize(OpenType.SFNT_UNPACK)
|
||
|
if sfntsize > datalen:
|
||
|
raise FontError, 'truncated font data'
|
||
|
sfntvers, numTables = struct.unpack(OpenType.SFNT_UNPACK, data[:sfntsize])[:2]
|
||
|
if sfntvers != OpenType.SFNT_CFF and sfntvers != OpenType.SFNT_TRUE:
|
||
|
raise FontError, 'invalid font type';
|
||
|
|
||
|
font = {}
|
||
|
font['version'] = sfntvers
|
||
|
font['numTables'] = numTables
|
||
|
|
||
|
# create set of offsets, lengths for tables
|
||
|
table_dir_size = struct.calcsize(OpenType.TABLE_DIR_UNPACK)
|
||
|
if sfntsize + table_dir_size * numTables > datalen:
|
||
|
raise FontError, 'truncated font data, table directory extends past end of data'
|
||
|
table_dir = {}
|
||
|
for i in range(0, numTables):
|
||
|
start = sfntsize + i * table_dir_size
|
||
|
end = start + table_dir_size
|
||
|
tag, check, bongo, dirlen = struct.unpack(OpenType.TABLE_DIR_UNPACK, data[start:end])
|
||
|
table_dir[tag] = {'offset': bongo, 'length': dirlen, 'checksum': check}
|
||
|
|
||
|
font['tableDir'] = table_dir
|
||
|
|
||
|
return font
|
||
|
|
||
|
def get_name_records(nametable):
|
||
|
"""reads through the name records within name table"""
|
||
|
name = {}
|
||
|
# read the header
|
||
|
headersize = 6
|
||
|
count, strOffset = struct.unpack('>2H', nametable[2:6])
|
||
|
namerecsize = struct.calcsize(OpenType.NAME_RECORD_UNPACK)
|
||
|
if count * namerecsize + headersize > len(nametable):
|
||
|
raise FontError, 'names exceed size of name table'
|
||
|
name['count'] = count
|
||
|
name['strOffset'] = strOffset
|
||
|
|
||
|
# read through the name records
|
||
|
namerecs = {}
|
||
|
for i in range(0, count):
|
||
|
start = headersize + i * namerecsize
|
||
|
end = start + namerecsize
|
||
|
platformID, encodingID, languageID, nameID, namelen, offset = struct.unpack(OpenType.NAME_RECORD_UNPACK, nametable[start:end])
|
||
|
if platformID != OpenType.PLATFORM_ID_MICROSOFT or \
|
||
|
encodingID != OpenType.ENCODING_ID_MICROSOFT_UNICODEBMP or \
|
||
|
languageID != OpenType.LANG_ID_MICROSOFT_EN_US:
|
||
|
continue
|
||
|
namerecs[nameID] = {'offset': offset, 'length': namelen}
|
||
|
|
||
|
name['namerecords'] = namerecs
|
||
|
return name
|
||
|
|
||
|
def make_eot_name_headers(fontdata, nameTableDir):
|
||
|
"""extracts names from the name table and generates the names header portion of the EOT header"""
|
||
|
nameoffset = nameTableDir['offset']
|
||
|
namelen = nameTableDir['length']
|
||
|
name = get_name_records(fontdata[nameoffset : nameoffset + namelen])
|
||
|
namestroffset = name['strOffset']
|
||
|
namerecs = name['namerecords']
|
||
|
|
||
|
eotnames = (OpenType.NAME_ID_FAMILY, OpenType.NAME_ID_STYLE, OpenType.NAME_ID_VERSION, OpenType.NAME_ID_FULL)
|
||
|
nameheaders = []
|
||
|
for nameid in eotnames:
|
||
|
if nameid in namerecs:
|
||
|
namerecord = namerecs[nameid]
|
||
|
noffset = namerecord['offset']
|
||
|
nlen = namerecord['length']
|
||
|
nformat = '%dH' % (nlen / 2) # length is in number of bytes
|
||
|
start = nameoffset + namestroffset + noffset
|
||
|
end = start + nlen
|
||
|
nstr = struct.unpack('>' + nformat, fontdata[start:end])
|
||
|
nameheaders.append(struct.pack('<H' + nformat + '2x', nlen, *nstr))
|
||
|
else:
|
||
|
nameheaders.append(struct.pack('4x')) # len = 0, padding = 0
|
||
|
|
||
|
return ''.join(nameheaders)
|
||
|
|
||
|
# just return a null-string (len = 0)
|
||
|
def make_root_string():
|
||
|
return struct.pack('2x')
|
||
|
|
||
|
def make_eot_header(fontdata):
|
||
|
"""given ttf font data produce an EOT header"""
|
||
|
fontDataSize = len(fontdata)
|
||
|
font = get_table_directory(fontdata)
|
||
|
|
||
|
# toss out .otf fonts, t2embed library doesn't support these
|
||
|
tableDir = font['tableDir']
|
||
|
|
||
|
# check for required tables
|
||
|
required = (OpenType.TABLE_HEAD, OpenType.TABLE_NAME, OpenType.TABLE_OS2)
|
||
|
for table in required:
|
||
|
if not (table in tableDir):
|
||
|
raise FontError, 'missing required table ' + multicharval(table)
|
||
|
|
||
|
# read name strings
|
||
|
|
||
|
# pull out data from individual tables to construct fixed header portion
|
||
|
# need to calculate eotSize before packing
|
||
|
version = EOT.EOT_VERSION
|
||
|
flags = 0
|
||
|
charset = EOT.EOT_DEFAULT_CHARSET
|
||
|
magicNumber = EOT.EOT_MAGIC_NUMBER
|
||
|
|
||
|
# read values from OS/2 table
|
||
|
os2Dir = tableDir[OpenType.TABLE_OS2]
|
||
|
os2offset = os2Dir['offset']
|
||
|
os2size = struct.calcsize(OpenType.OS2_UNPACK)
|
||
|
|
||
|
if os2size > os2Dir['length']:
|
||
|
raise FontError, 'OS/2 table invalid length'
|
||
|
|
||
|
os2fields = struct.unpack(OpenType.OS2_UNPACK, fontdata[os2offset : os2offset + os2size])
|
||
|
|
||
|
panose = []
|
||
|
urange = []
|
||
|
codepage = []
|
||
|
|
||
|
weight, fsType = os2fields[:2]
|
||
|
panose[:10] = os2fields[2:12]
|
||
|
urange[:4] = os2fields[12:16]
|
||
|
fsSelection = os2fields[16]
|
||
|
codepage[:2] = os2fields[17:19]
|
||
|
|
||
|
italic = fsSelection & OpenType.OS2_FSSELECTION_ITALIC
|
||
|
|
||
|
# read in values from head table
|
||
|
headDir = tableDir[OpenType.TABLE_HEAD]
|
||
|
headoffset = headDir['offset']
|
||
|
headsize = struct.calcsize(OpenType.HEAD_UNPACK)
|
||
|
|
||
|
if headsize > headDir['length']:
|
||
|
raise FontError, 'head table invalid length'
|
||
|
|
||
|
headfields = struct.unpack(OpenType.HEAD_UNPACK, fontdata[headoffset : headoffset + headsize])
|
||
|
checkSumAdjustment = headfields[0]
|
||
|
|
||
|
# make name headers
|
||
|
nameheaders = make_eot_name_headers(fontdata, tableDir[OpenType.TABLE_NAME])
|
||
|
rootstring = make_root_string()
|
||
|
|
||
|
# calculate the total eot size
|
||
|
eotSize = struct.calcsize(EOT.EOT_HEADER_PACK) + len(nameheaders) + len(rootstring) + fontDataSize
|
||
|
fixed = struct.pack(EOT.EOT_HEADER_PACK,
|
||
|
*([eotSize, fontDataSize, version, flags] + panose + [charset, italic] +
|
||
|
[weight, fsType, magicNumber] + urange + codepage + [checkSumAdjustment]))
|
||
|
|
||
|
return ''.join((fixed, nameheaders, rootstring))
|
||
|
|
||
|
|
||
|
def write_eot_font(eot, header, data):
|
||
|
open(eot,'wb').write(''.join((header, data)))
|
||
|
return
|
||
|
|
||
|
def main():
|
||
|
|
||
|
# deal with options
|
||
|
p = optparse.OptionParser()
|
||
|
p.add_option('--output', '-o', default="world")
|
||
|
options, args = p.parse_args()
|
||
|
|
||
|
# iterate over font files
|
||
|
for f in args:
|
||
|
data = readfont(f)
|
||
|
if len(data) == 0:
|
||
|
print 'Error reading %s' % f
|
||
|
else:
|
||
|
eot = eotname(f)
|
||
|
header = make_eot_header(data)
|
||
|
write_eot_font(eot, header, data)
|
||
|
|
||
|
|
||
|
if __name__ == '__main__':
|
||
|
main()
|
||
|
|
||
|
|